New Extraterrestrial Signature of the Insoluble Organic Matter of the Orgueil, Murchison and Tagish Lake Meteorites as Revealed by Electron Paramagnetic Resonance

Processing of meteoritic organic materials as a possible analog of early molecular evolution in planetary environments.

The composition of the Sutter's Mill meteorite insoluble organic material was studied both in toto by solid-state NMR spectroscopy of the powders and by gas chromatography-mass spectrometry analyses of compounds released upon their hydrothermal treatment. Results were compared with those obtained for other meteorites of diverse classifications (Murray, GRA 95229, Murchison, Orgueil, and Tagish ...

Organic Constituents in Carbonaceous Chondrites; Evidence for Preservation of Pristine Particles of Mixed Origins

Introduction: Carbonaceous chondrites are primitive meteorites that have sampled the oldest conden-sates of the solar system. They have accreted components of various origins: CAIs (also known as refrac-tory inclusions), chondrules, ice, noble gases and or-ganics. Radioactive decay of short lived radionucleides quickly heated these parent bodies and drove thermal metamorphism and aqueous altera...

Chemical and Isotopic Diversity of Organic Particles in Chondrites: Parent Body vs. Nebular Processes

Introduction: Insoluble organic matter (IOM), the main organic constituent in chondrites, has been extensively studied after HF/HCl isolation techniques. Bulk isotopic compositions and elemental ratios show variations between chondrite groups, whereas they are quite homogeneous within each class [1]. Recent isotopic measurements by ion probes have revealed that IOM is heterogeneous at the sub-m...

NANOSIMS MAPPING OF ORGANIC MATTER IN ORGUEIL AND TAGISH LAKE CARBONACEOUS CHONDRITES: NEW DATA ON THE RELATIONSHIPS WITH THE MINERAL MATRIX. L. Remusat,

Chemical and Isotopic Diversity of Organic Particles in Chondrites: Parent Body

Introduction: Insoluble organic matter (IOM), the main organic constituent in chondrites, has been extensively studied after HF/HCl isolation techniques. Bulk isotopic compositions and elemental ratios show variations between chondrite groups, whereas they are quite homogeneous within each class [1]. Recent isotopic measurements by ion probes have revealed that IOM is heterogeneous at the sub-m...